Reversing mechanism for rotary motors.



o. 810,890. PATENTED JAN. 23, 1906.

' A. H. TAYLOR. REVERSING MECHANISM FOR ROTARY MOTORS.

APPLICATION FILED JULY 14,1905.

2 SHEETS-SHEET 1.

PATENTED JAN. 23, 1906.

. A. H'. TAYLOR.

REVERSING MECHANISM FOR ROTARY MOTORS.

APPLICATION FILED JULY 14,1905.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT OFFICE.

ALBERT H. TAYLOR, OF EASTON, PENNSYLVANIA, ASSIGNOR TO THEINGERSOLL-SERGEANT DRILL COMPANY, OF NEW YORK, N. Y., A CORPORATION OFWEST VIRGINIA.

Specification of Letters Patent.

Patented Jan. 23, 1906.

Application filed July 14, 1905. Serial No. 269,607.

To all whom it may concern.-

Be it known that I, ALBERT H. TAYLOR, a citizen of the United States,and a resident of Easton, in the county of Northampton and State ofPennsylvania, have invented a new and useful Reversing Mechanism forRotary Motors, of which the following is a specification.

The object of my invention is to provide certain improvements inreversing mechanism for rotary motors in which the movements of thereversing-valve are controlled by a manually-operated auxiliary valve,the reversing-valve being located in one cylinderhead and the auxiliaryvalve in the other cylinder-head of the motor.

This invention is shown herein as applied to a pneumatic motor of therotary-piston type adapted for use as a drill.

A practical embodiment of my invention is represented in theaccompanyingdrawings, in which- Figure 1 represents in top plan a rotary neumaticmotor embodying my invention. Fig. 2 is a side view of the same,portions of the motor being broken away to more clearly show thepositions of the valves therein. Fig. 3 is a horizontal section taken inthe plane of the line A A of Fig. 2 looking in the direction of thearrows. Fig. 4 is a section taken through the lower cylinder-head in theplane of the reversing-valve. Fig. 5 is a diagrammatic view showing thepositions which the parts assume when the motor is running in onedirection. Figs. 6 and 7 are detail sections taken in the planes of thelines B and C, respectively, of Fig. 5. Fig. 8 is a diagrammatic viewshowing the positions which the parts assume when the motor is runningin the reverse direction, and Figs. 9 and 10 are detail sections takenin the planes of the lines B and C, respectively, of Fig. 8.

The body of the pneumatic motor of the rotary-piston type in connectionwith which this invention is shown is denoted by 1, its upper.

is mounted eccentrically therein.

The passage for admitting the supply of motive fluid to the motor isdenoted by 6. This passage is shown as disposed vertically in the wallof the body of the motor and is provided with a port 7, opening into thereversing-valve chamber 8 in the lower cylinder-head 3 of the motor.Communication is established between the reversing-valve chamber 8 andthe piston-chamber 4 upon opposite sides of the contact-point of thepiston with the wall of the chamber by means of ports 9 and 10 throughthe walls of the pistonchamber, which open into separated passages 11and 12 in the body of the motor, and ports 13 and 14, which open fromthe said separated passages into the reversing-valve chamber 8.

-Exhaust-ports 15 and 16 also open from the reversing-valve chamber tothe exterior.

The reversing-valve which is mounted in the chamber is denoted by 17. Itis preferably confined in the chamber between two removable screw-caps18 and 19, which close the opposite ends of the chamber 8. This valve 17is provided with three ports 20 21 22, which are formed in the presentinstance by providing the valve with reduced diameters. The port 20 isarranged to open the port 7 to the port 13, leading to one side of thepiston-chamber 4-when the valve is at the limit of its movement in onedirection and arranged to open communication from the port 7 to the port14, leading to the other side of the piston-chamber when the valve is atthe limit of its movement in the other direction. When the ports 7 and13 are opened, the port 14 is opened to the exhaust 15 through thevalve-port 21. When the port 7 is open to the port 14, the port 13 isopen to the exhaust 16 through the valve port 22. A spring 23 isarranged to yieldingly hold the valve 17 at the limit of its movement inone direction for opening the ports in position to run the motor in aforward direction. The means which I have shown for moving the valve ina direction to reverse the motor is constructed and arranged as follows:A manually o erated auxiliary valve 24 is mounted in t e upper head 2 ofthe motor, which valve is provided with a handle 25 exterior to themotor for use in operating the same. In the present instance this valveis shown as a rocking plug-valve. A passage 26 leads from thefluid-pressure-inlet passage 6 to a port 27 opening to the face of theauxiliary valve 24. A second passage28 leads to a port 29, which opensinto the end of the reversing-valve chamber 8 to a port 30, which opensonto the face of the auxiliary valve 24. A third passage 31 leads to theatmosphere from a port 32, opening onto the face of the said auxiliaryvalve 24. This auxiliary valve 24 is provided with a bridge-port 33,arranged to open and close communication from the passage 26 to thepassage 28, and a throughport 34, arranged to open and closecommunication from the passage 28 to the exhaustpassage 31. These portsare so arranged that when the passages 26 and 28 are in com municationthe passages 28 and 31 are closed, and vice versa.

In operation, supposing the parts to be in the positions in which theyare shown in diagram in Fig. 5, with the reversing-valve held in itsnormal position by the spring 23, the motive fluid is open to the inletside of the motor through the ports 7 and 14 and reversing-valve port20. At the same time the exhaust side of the motor is open to theexhaust through the ports 13 and 16 and valve-port 22. The auxiliaryvalve 24 is in a position to close communication from the passage 26 tothe passage 28. l/Vhen it is desired to reverse the motor, the auxiliaryvalve 24 is turned to bring the passage 26 into communication with thepassage 28. This will feed pressure into the reversing-valve chamber 8in front of the valve and slide it back against the tension of itsspring 23 until the port 7 is open to the port 13 and the port 14 isopen to the port 15. It will be seen that the opening of these portsreverses the direction of the motor. When it is desired to again rotatethe motor in a forward direction, the valve 24 is turned to closecommunication from the passage 26 to the passage 28 and to opencommunication from the passage 28 to the exhaust-passage 31. This willrelieve the pressure on the reversing-valve and permit the spring 23 tomove it into its original position.

It will be seen that by mounting the parts of the reversing mechanism inthe cylinderheads of the motor I am enabled to provide a very simple andconvenient arrangement without the necessity of producing a complicatedmotor-cylinder. It will also be seen that the operation of the mechanismis extremely simple and positive and that the mechanism itself isreadily accessible.

8 While I have shown this mechanism in connection with a pneumatic motorof the rotary-piston type adapted for use as a drill, it is to beunderstood that I do not wish to limit myself strictly to thisconstruction; but

What I claim is l. A motor, means for supplying motive fluid thereto, areversing-valve, a spring for holding the valve at the limit of itsmovement in one direction and a manually-operated auxiliary valve forcontrolling the movetrolling the supply of motive fluid to thereversing-valve.

3. The combination with the cylinder and cylinder-heads of a rotarymotor and means for supplying motive fluid thereto, of a reversing-valvelocated in one head and a manually-operated auxiliary valve located inthe other head arranged to control the movements of the reversing-valve.

4. A motor, means for supplying motive fluid thereto, a reversing-valve,passages leading from the motive-fluid supply and the opposite sides ofthe motor piston-chamber to the face of the valve, a port in the valvefor alternately opening communication from the fluid-supply passage tothe one or the other of the motor piston-supply passages, exhaust-portsopening to the face of the said valve and ports in the valve foralternately opening communication from the one or the other of the motorpiston-supply passages to the one or the other of the saidexhaust-passages, a spring for moving the reversing-valve in onedirection and means for controlling the supply of motive fluid formoving the valve in the opposite direction.

5. A motor, means for supplying motive fluid thereto, a reversing-valve,a spring for 'yieldingly holding the valve at the limit of its movementin one direction, a manuallyoperated valve, passages leading from thereversing-valve chamber and the motive-fluidinlet passage to the face ofthe said auxiliary valve and ports in the said valve for alternatelyopening the passage from the motivefluid supply to the reversing-valvepassage apld the reversing-valve passage to the atmosere.

p 6. The combination with the cylinder and cylinder-heads of a rotarymotor and means for supplying motive fluid thereto, of a reversing-valvelocated in a horizontal direction in one cylinder-head, a spring forholding the valve'at the limit of its movement in one direction and amanually-operated auxiliary valve located in the other cylinder-head forcontrolling the movements of the reversing-valve.

7. The combination with the cylinder and cylinder-heads of a rotarymotor and means for supplying motive fluid thereto, of a reversing-valvelocated in a horizontal direction in one cylinder-head, means forpermitting the removal of the valve from the cylinder-head, a spring forholding the valve at ence of two Witnesses, this 12th day of July, thelimit of its movement in one direction and 1905.

a manually-operated auxiliary valve located i in the other cylinder-headfor controlling the ALBERT Y 5 movements of the reversing-valve.Witnesses:

In testimony that I claim the foregoing as C. S. SUNDGREN,

my invention I have signed my name, in pres- FREDK. HAYNES.

